J. L. LOBLEY— CRETACEOUS ROCKS OF ENGLAND. 3 



■piG. 1. Sectmi showing the approximate relative thickness of the 



British Sedimentary Racks. 



Tertiary or Cainozoic 



Secondary or Mesozoic 



Primary or Palaeozoic . J 



Upper Tertiaries. 



Eocene. 



Cretaceous. 



Carboniferous. 



I ii.'vonian. 



Cambrian. 



